Concentrating apparatus.



No. 669,043. Patented Feb. 26, 190|.

A. K. cRoss.

GONGENTRA'TING APPARATUS.

, v (Application led Aug. 20 1900.)

(No Modal.)

ADOLPH K. CROSS, OF DENVER, COLORADO.

coNcEnTeA-rine APPARATUS.

SPECFlUAlON forming part of Letters Patent No. 669,043, dated February26, -1901.

Application led August 20, 1900. Serial No.27y363. (No model.)

To all whom, it may concern:

Be it known that I, ADOLPH K. CROSS, a citizen of Germany, residing atDenver, in the county of Arapahoe and State of Colorado, have inventedcertain new and useful Improvementsin Ooncentrating Apparatus; and I dodeclare the following to be a full, clear, and exact description of theinvention, such as will en able others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the figures of reference marked thereon,which form a part of this specification.

My invention relates to improvements in apparatus for saving` themetallic values of pulverized ore or placer material by concentration;and to this end theinvention consists of the features, arrangements, andcombinations hereinafter described and claimed, all of which will befully understood by reference to the accompanying drawings, in which isillustrated an embodiment thereof.

In the drawings, Figure lis a vertical longitudinal section taken on theline as Fig. 2. Fig. 2 is an end elevation of the apparatus viewed froma position at the left of Fig. l. Fig. 3 is a perspective view ofmyimproved concentrating-screen.

The same reference characters indicate the same parts in all the views.

Let the n umeral 5 designate a suitable frame upon which is swung atrough or sluice 6. To the sides GfL of this trough .are connected thelower extremities of depending rods or hangers 7, whose upperextremities are movably connected with the frame. The arrangement of therods '7 is such as to permit a lateral oscillation of the trough throughthe instrumentality of suitable mechanism. As shown in the drawings, acrank-shaft 8 is journaled to one side of the frame, and rods 9 leadfrom cranks of this shaft to the trough, the arrangement being such thatas the crankshaft is rotated an oscillating movement is imparted to thetrough in a direction at right angles to its length. The trough is sohung as to give it a suitable inclination, its head or right-handextremity (see Fig. l) being highest. Near the lower extremity or tailof the trough an opening 6C is formed in its bottom. In the rear of thisopening is placed a part 6, which is oppositely inclined from the upperportion of the troughs bottom. Suitably supported in this trough is ascreen l0, composed of flat longitudinal strips 10a, interwoven withtransverse strips, wires, or rods 10c. The strips lOa are placed incontact with each other, while the transverse strips or wires l()c areplaced some distance apart. In forming the screen any two adjacentstrips l0 are passed the one above and the other below the sametransverse wire, while each strip 10 is passed alternately above andbelow the transverse wires. Hence cells or depressions l0d are formed inthe alternate strips 10iL on the line of any wire 10c. These cells haveside openings, but no vertical outlet, since the strips l0 are closetogether. As shown in the drawings, the cross-wires l()c are fastened bybending their eXtremities to form hooks 10g, which engage the outeredges of the outer strips 10a. This screen, as shown in the drawings,forms a concentrating-table which is supported by cleats 6g, attached tothe opposite sides of the table. Only one of these cleats is shown inthe drawings.

Vhen the apparatus is in use, the material to be treated is fed in theform of pulp upon the upper extremity of the screen-table from a hopperl2 (see dotted lines, Fig. l) or in any other suitable manner, while alateral oscillation or vibrator-y movement is imparted to the trough orsluice at right angles to the direction of the strips l0 ot' the table.Under the influence of this movement the metallic values are caused tosettle in the cells 10d of the table, while the gangue is carrieddownwardly by the water and discharged at the tail of the table. Thefiner concentrates pass through the side openings of the cells l0d andthence into the bottom of the trough or sluice, from which they aredischarged IOO jacent side edges in Contact, and separated In testimonywhereof I affix my signature -transverse Wires or rods with which thesaid in presence of tWo Witnesses. strips are interwoven to form cellshaving side openings, but no vertical outlet, and means for imparting aVibratory movement Witnesses: to the table at right angles to the lengthof DORA C. SHICK, the longitudinal strips; MARY C. LAMB.

ADOLPH K. CROSS;

